having trouble solving these type of equations, help pls !

Given the following expression:
[tex]\text{ g(x) = -x - 10}[/tex]Let's find g(8/23),
We get,
[tex]\text{ g(x) = -x - 10}[/tex][tex]\text{ g(}\frac{8}{23}\text{) = -(}\frac{8}{23})\text{ - 10}[/tex][tex]\text{= -}\frac{8}{23}\text{ - 10}[/tex][tex]\text{= -}\frac{8}{23}\text{ - }\frac{230}{23}\text{ = }\frac{-8\text{ - 230}}{23}[/tex][tex]g(\frac{8}{23})=\text{ }\frac{-238}{23}\text{ = -}\frac{238}{23}[/tex]Therefore, the answer is -238/23